.topicList {
  padding: 0 20px 20px 20px;
  background-color: #FFF;
  border: 1px solid #dfdfdf;
  border-radius: 4px;
  box-shadow: 0 1px 2px 0 rgba(158, 158, 158, 0.2); }
  .topicList .header .title {
    background: #E8EAEB;
    height: 36px;
    line-height: 36px;
    padding-left: 10px;
    text-align: center;
    margin: 0 -20px 20px -20px; }
  .topicList section {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    margin-bottom: 50px; }
    .topicList section .item {
      width: 280px;
      height: 320px;
      margin: 10px;
      padding: 10px;
      display: -webkit-box;
      display: -ms-flexbox;
      display: flex;
      -webkit-box-orient: vertical;
      -webkit-box-direction: normal;
          -ms-flex-direction: column;
              flex-direction: column;
      border: 1px solid #dcdcdc;
      box-shadow: 0 1px 2px 0 rgba(158, 158, 158, 0.2); }
      .topicList section .item .background {
        position: relative; }
        .topicList section .item .background img {
          width: 100%; }
        .topicList section .item .background .tr {
          width: 100%;
          position: absolute;
          bottom: 0;
          height: 30px;
          background-color: rgba(255, 255, 255, 0.8);
          font-size: 18px;
          display: -webkit-box;
          display: -ms-flexbox;
          display: flex;
          -webkit-box-align: center;
              -ms-flex-align: center;
                  align-items: center;
          -webkit-box-pack: end;
              -ms-flex-pack: end;
                  justify-content: flex-end;
          -webkit-box-flex: 1;
              -ms-flex: 1;
                  flex: 1; }
          .topicList section .item .background .tr span {
            margin: 0 10px;
            cursor: pointer; }
            .topicList section .item .background .tr span i {
              margin-right: 5px; }
      .topicList section .item .title {
        margin: 10px 0; }
      .topicList section .item .intro {
        font-size: 12px;
        line-height: 1.2;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical; }
      .topicList section .item .op {
        -webkit-box-flex: 1;
            -ms-flex: 1;
                flex: 1;
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: end;
            -ms-flex-align: end;
                align-items: flex-end;
        -webkit-box-pack: justify;
            -ms-flex-pack: justify;
                justify-content: space-between; }
        .topicList section .item .op i {
          cursor: pointer;
          margin-right: 5px; }
        .topicList section .item .op .left .glyphicon-pushpin {
          -webkit-transform: rotate(-45deg);
                  transform: rotate(-45deg); }
        .topicList section .item .op .left .un-top {
          -webkit-transform: rotate(0deg);
                  transform: rotate(0deg); }
        .topicList section .item .op .left .un-display {
          color: greenyellow; }
        .topicList section .item .op .left .display {
          color: red; }
